<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			div {
				/* 弹性盒子 */
				display: flex;
				width: 80%;
				height: 600px;
				background-color: antiquewhite;
				
				/* 
				
				   flex-direction: 设置主轴方向 
				   row:x轴
				   column:y轴
				*/
				flex-direction: column;
				
				/* 
				   justify-content:排列方式 
				*/
			   justify-content: space-around;
			}

			div span {
				width: 100px;
				height: 100px;
				background-color: orange;
				margin: 2px;
			}
		</style>
	</head>
	<body>
		<div>
			<span>1</span>
			<span>2</span>
			<span>3</span>
		</div>
	</body>
</html>
